VB6 and Excel loading then unloading immediately

Question

First off I posted this here
http://social.msdn.microsoft.com/Forums/office/en-US/4c07879b-e033-4e8f-8266-95f9f606923a/vb6-and-excel-loading-then-unloading-immediately?forum=exceldev However I think this is the right forum for this.
We have an old VB6 application that uses data from and to Excel 97-2003 XLS and
Access MDB. This application is slated to be updated to VS2012 and VB.NET. In
the mean time I have a glitch that I cannot seem to find the issue. When we
load the VB6 app it opens Excel 2010 in the background for getting and setting
data. We are set to roll out Office 2010 on everyone’s system and I am still
unable to find why it works fine on two systems and not on others. With Office
2007 everything seems to work just fine.
What happens is when I look at the processes in Task Manager on my Windows 7
Enterprise edition with Office Professional Plus 2010 system while loading
the VB6 app I see?
EXCEL.EXE *32 | "My user name" | 00 CPU | 10,132k | Microsoft Excel
This is normal and stays in process the entire time I run it on my system. I also have
this working on another end users system. However the issue and the fix I used
on our two systems does not seem to work on other systems. I launch the VB6 app
and it comes up.
EXCEL.EXE *32 | "My user name" | 00 CPU | 10,132k | Microsoft Excel
This loads in the processes and then immediately unloads without any errors. Then when I
execute something that needs to use Excel I get.
Run-Time error ‘91’:
Object variable or With block variable not set.
This only happens if Excel unloads immediately otherwise the program works great. There
are no events in any of the event logs and our other IT guy said it is loading
and unloading normally with out crashing.
I have applied this to the systems http://support.microsoft.com/kb/926430/en-us . In
all of my searching this looked like the best answer. However only two systems
are working with Office Professional Plus 2010.
Here are the references and components.
References:
Visual Basic For Applications
Visual Basic runtime objects and procedures
Visual Basic objects and procedures
OLE Automation
Microsoft DAO 3.6 Object Library
Microsoft Excel 5.0 Object Library
Components:
Controls
Desaware Animated Button Control
Microsoft Common Dialog Control 6.0 (SP6)
Microsoft Data Bound Grid Control 5.0 (SP6)
Designers
Dat Environment
Data Report
DHTML Page
WebClass
Code:
Public xlApp As Excel.Application
Public WBSetup As Excel.Workbook
Public objWbCALC As Excel.Workbook
Public objShtLEVELS As Excel.Worksheet
Sub Main()
' There is more code here that is not specific to Excel issue
Set xlApp = Excel.Application
' Get the workbook.
Set objWbCALC = xlApp.Workbooks.Open("c:\temp\Calc.xls")
Set WBSetup = xlApp.Workbooks.Open("c:\temp\Setup.xls")
' Get worksheet
Set objShtLEVELS = objWbCALC.Worksheets("Levels")
' There is more code here that is not specific to Excel issue
End Sub
This is working on one system that had Office 2007 and was upgraded to Office 2010. Working on my system with Office 2010. The EXE file is ran from the server you can install it or add the OCX files to local system and register them with regsvr32. No
new components have been added or changed to the actual VB6 application. It seems to work on two systems and not on other systems.
However our test system have Office 2010 loaded on it and never had office 2007 on it. Maybe there is a residual left over file on it.
Any ideas?
www.ipdg3.com

Answer 1

Hello,
Thank you for your post.
I am afraid that the issue is out of support range of VS General Question forum which mainly discusses
WPF & SL designer, Visual Studio Guidance Automation Toolkit, Developer Documentation and Help System
and Visual Studio Editor.
I would like to know whether you can get the same issue when you create/load a Visual Basic application rather than VB6 in VS2012. If the issue only occurs when you load VB6 app, as Andrew said, there are other better forums for
VB6 app provided in this thread:
http://social.msdn.microsoft.com/Forums/vstudio/en-US/6a0719fe-14af-47f7-9f51-a8ea2b9c8d6b/where-to-post-your-vb-6-questions?forum=vbgeneral
For example:
VB Forums
VB City
Best regards,
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